Furnace for burning refuse.



W. PIERNAY. FURNACE FOR BURNING'REFUSE.

APPHCAHON FILED MAY". 19.

Patented Jan. 9, 1917.

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MLn-n Htmvnv Wu-J Arman-Y W. PIERNAY. FURNACE FOR BURNING REFUSE.APPLICAUON FILED nuns. 1914.

1,211,875, Patented Jan. 9,1917.

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FURNACE FOR BURNING REFUSE.

arrucmon men Imus. 1914.

1,21 1,875. Patented Jan. 9,191.7.

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Mrmgsfi hr cw ran 1444/. T58 Pxznml v UNITED STATES PATENT OFFICE.

WALTER PIEBNAY, 0F STETTIN,' GERMANY, ASSIGNOR TO STETTINER CHAMOTTE-FABBIK LCTIEN-GESELLSCHAFT VORMALS DIDIER, OF STETTIN, GERMANY.

FURNACE FOR BURNING REFUSE.

Specification of Letters Intent.

Patented Jan. 9, 1917.

Application filed May 16, 1914. Serial No. 839,129

lowing to be a full, clear, and exact descripti n of the same.

ll elinvention relates to improvements in furnaces-fol the combustion ofrefuse and the like ha'ving'no grate. Tn furnaces of this kindtheinaterialto be burnt is fed in,

during the operation of the furnace, from "above, in the same: degree inwhich the com-- bastion takes place, and the slag and ashes lire removedat the bottom of the shaft. The removal of the slag is effected bymoving ,a cutting device through the furnace shaft, whereupon the soleclosingthe shaft at the l'|ottom is pulled out. The loosened end of theslag column can then fall downward.

Tl'aerenfter the furnace sole is again inserted and pressed tight, andthe slag removing device. which in the meantime has carried the charge,is pulled back.

My invention has the object, in the first "fiillace, to so construct andarrange the means cutting out the slag column and'for m ning the sole ofthe furnace, that the aticndance can take place from the front of thefurnace, so that the workmen are not forced ti-remain in the pit intowhich the looscnedslag falls. For the purpose of cutting through theslaga. portable device slag to adhere to the furnace shaft as little aspossible and to enable it to move downward as easily. as possible, it ispreferable to provide the 'combustionjhaft with a water- This ironmantle has double conical nozzles are exebangcably-jnsorted. Ehrengnthese nozzles the air necessary for the combustion is hlownin and oneeature of my invention consists in the fact that the distance of thenarrowest seccarriage. and Fig. 9. a plan of'same.

mg to my invention, whicli'is tion of the nozzle from the interiormantle of the combustion shaft is about one third of the thickness ofthe cooling mantle, so that the currents cross each other behind thenarrowest section of the nozzle ata point which is still within thenozzle, thus outside of the combustion shaft. Further essential featuresofmy invention will be referred to'in explaining the drawings, in whichone construction of the invention is shown by way of example.

Figure 1 is a vertical section through a fur-11am cell of a furnace forburning refuse. Fig. 2 is a front elevation of a furnace on a largerscale. Fig. 3 shows the means for fastening the slag removing carriageto the furnace. Fig. -l is a section through the lower part of thecooling mantle on a larger scale. Fig. 5 shows a section on the line ABof Fig. 4. Fig. 6 is a longitudinal section through a nozzle on a largerscale. Fig. 7 represents the slag removing carriage in section on theline C-D of Fig. 8. Fig. 8 is a front elevation of the slag remmiqing1g. 10 shows the removable furnace sole in vertical section. Fig. 11 isa section on the lin'e,E-F of Fig. 10. Fig. 12 is a section of anotherconstruction of the furnace sole. Fig. 13 represents the releasablecoupling between the slag removing carriage and the sole of thefurnace."

The shaft of the furnace consists of the filling chamber .1,the'rcombustion chamber 2 and the slag chamber 3, which is closed at thebottom by -the removable sole M Essential for'the operation of thefurnace isthe slag removmgcarriage N. on which.

can issue again at the upper endiof the mantle through the pipe 6 in ahot condi tron. Near to the lower end of the cooling mantle doubleconical nozzlesare insertedin the tubes 7, through 'which, nozzles anair required for the combustion, the so-called blast, enters. The air isfed through the "pipe 9'and passesthrough the funnel shaped f urn ace.

branchpipe 9 into the annular chamber shown, because they can have any10, into which the" nozzles 8 enter. The interior section of a tube 7corresponds to the outer diameter of the double conical nozzle 8, whichis preferably so formed that the narrowest section, as shown in Fig. 6,is at a distance from the interior of :the mantle equal to about onethlrd of the thickness of the cooling mantle 4'. In this con structionof the nozzle the crossing point 12 of the air currents have accordinglytime to unite again before they impinge-on the charge. By this means theair can penetrate to the .middle of the refuse column without eddyingcurrents being formed. Experiments have shown that by using the newnozzles the consumption of power n blowing in the air is much reduced,while on the other'hand the output of the furnace is considerablyincreased.

The slag removing carriage N has Wheels 14 keyed on the shaft 13 andrunnin on the rails 15, can therefore be moved rom one furnace cell tothe other. That is effected by turning the hand crank 16, on the shaft17 of which a chain wheel 18 is mounted, from which a chain 19 passes tothe chain wheel 20 keyed on the shaft 13. When the slag removingcarriage N has been moved into the correct position before the furnacecell from which the slag is to be removed and the openingf21 in the wallof the furnace has'been made clear, the slag cuttingdevice O is movedtoward the This cutting device has a frame 22 consistin wheels 23 w ichrun on the rails-25 fastened to theframe 24 of the slag removingcarriage'N. The slag cutting device proper consists referably of a frame27 covered by the p ate 26, on the front wall of which the knife 28 ofcast steel is removabl'y "attached by screws 29. Thisknife, in thepreferred formfhasa wedge shape in cross section .,.(Fig.' 7) and hasa'curved front cuttingedge: 30' (F gcutting device Oflihgmoved towardthe furnace cell on the rails 25, the front -part.-of the U -iron frame22 enters the opening 21. In orderto fastenthe slag cutting device inthis osit ion bolts '31, pivoted to the wall of the urna'ce 32, arethrown-overears 33 fastened to the U-iron .22 (Fig. 3). The

I cutting movement can be given to the knife 28 by any suitablemechanism, for example, by spur-wheel gearing turned by hand, or by anelectromotor or other engine. In the example illustrated a hydraulicress is shown for the purpose, the frame 2 of the slag cutting devicebeing fastened to the piston rods 34 of two hydraulic cylinders 35fastened .to the frame of the s1 removing device 0. The parts requiredfor operating the hydraulic cylinder are not of U-iron or the like andWhen the slag knife 28 is inclined at an acute angle to the guide rails'36, no pressure is exerted backward in cutting the slag column, but thecharge over the cutting plane is rather raised and glides over the slagcutting surface of the knife onto the platform 26." The part of the slagunderneath the cutting plane rests on the platform 38 of the movablefurnace sole M and must fall when this sole is pulled out.

The platform 38 is fastened on the frame ,39 of U-iron or the like, inwhich the shaft 40 is journaled. On this shaft 40 are secured the worms41, each of which on ages .in a worm wheel on one of the two SiflftS 43.Each shaft 43 rotates in bearings 44 secured -to the frame 39. Outsideof the bearing 44 the supportin wheels'45 are adapted to rotate on the safts 43 and run on the rails 46. On the extreme end of the shafts 43 theeccentrics 47 are keyed, which rest on the rails 48. rails-46, but alsothe rails 48 are fastened on brackets'49' which are secured in thebrickwork of the furnace. As will be evident,.on turning the shaft 40through the agency of the worm gearing 41' 42, the shafts '43, and conseuently also t e eccentries, 47, are uniform y turned, When the shaft 43turns in one direction, the frame 39 is'iraised together with theplatform 38 and thus the platform is pressed a ainstthe knife edges 50'provided on the ower edge of the furnace shaft, while b turn ing in theop osite direction the p atforin is lowered mi N released. The sameresult is. obtained in the constructionshownin Fig. 12 in a'sim--porting wheels 45, which otate on the replaced for ,a few millimeters inregard to the middle axes if the shafts 43. By turning the shafts 43 theframe 39 and foundaftlon plate 38 are raised or lowered. .The

rotation of the shaft 4Q takes means of a hand crank, which on thesquare of theshaft.

As-soon as the sole of the furnace is l'owered, thus loosened, it can bemoved on'the rails 46,. This motion takes place from the slag removingcarnage N, and for this pur- Not only the the sole of the furnace thus Iv pler manner by the middle axes of the supduced pins 43' of the sha ts43, being dis- 1 b ace y V p i; placed provided: on the .front end posethe arm 52 provided on the sole of the furnace is coupled with thesliding toothed rack of the slag removing carriage. The front end 51 ofthe arm has for this purpose a fork shape and the correspoinling end 55of the toothed rack 53 has an eye. The end 55 can be introduced into thefork 5-1 and by inserting a pin 56 through the opening 57 of the end andthrough the opening 58 of the fork 5% the arm may be connected with thetoothed rack 53. Of course the connection between the arm 52 and toothedrack 53 may be effected in any other suitable manner. Further instead ofthe toothed rack any other known gear may be used, by means of whichfrom the slag removing carriage N the furnace sole M can be movedbackward and forward. The

toothed rack 53 runs on rolls 59 adapted to turn in Standards 60. Thesestandards 60 are secured to the frame of the slag removing carriage N.In the toothed rack 53 engages a spur-wheel 61, on the shaft 62 of whichthe larger spur-wheel 63 is keyed which engages with the spur-Wheel 6 onthe pins 65 of the handle 66. By the rotation of this handle the toothedrack 53 is moved backward and forward.

If the slag is not removed the openingQl through which the slag cuttingdevice 0 is inserted, is closed by a slide 67 while the opening 68 bywhich the sole of the furnace is removed, is closed by a slide 69. Bothslides 67 and 69 are connected by rods 70 and carried by cords 71hanging from rolls 72 on the shaft 73. ()n this shaft 73 are alsosecured rolls 74 on which by means of ropes 75 the counter weights 76are supported. The counter Weights 76 are of such dimensions that theynearly correspond to the weight of the slides 67, 69, so that in orderto move the rods only but little power is necessary. The slide 67 runswith its outside edges in guides 77 and the slide 69 with its outsideedges in guides 78, While the rods 79 carrying counter weights 76 run inguides 80.

The slag removing operation takes place as follows: After the slagremoving carriage N has been moved to the furnace cell from which theslag is to be removed, the workman turns on the cooling water and theair blast and by raising the slides 67 and 69 opens 21 for the slagcutting device 0 and 68 for pulling out the furnace sole M. Thereafterthe slag cutting device 0 is moved. toward the opening 21 of the furnaceand the frame 22 is fastened by he bolt 31. By introducing water underpressure into the hydraulic cylinder 35 the slag cutting device O ismoved through the shaft of the furnace, so that the part of the slagunderneath the cutting edge 30 of the knife 28 is cut off. Thereafterthe front furnace workman lowers the frame 39 together with the platform38 for a few millimeters by turning the shaft 40, connects the toothedrack 53 of the carriage X \vitlrthe arm 52 of the furnace sole M. andmoves the carriage by turning the handle 66 forward. in consequence ofthe lnovement given to the toothed rack 52 The loosened slag falls, anda cylinder 81 fastened at the back end of the sole M, which, when thesole M is removed, forms an extension of the shaft 3, serves as a guidefor the falling slag, so that the slag arrives on the iron transportbelt 82, by which it is carried to the slag breaker. The furnace sole isthen again inserted and pressed tight, the slag removing device ispulled out. and the openings '31 and (38 are closed by the slides 67 and69.

hat I claim and desire to secure by Letters Patent of the United Statesis:

1. In a furnace for burning refuse, the combination of a shaft; aremovable solo at the bottom of the shaft; a carriage in front of theshaft; a sla cutting device on said carriage and comprising a partadapted to be projected into the shaft; and a means carried on thecarriage for operating the sole.

2. In a furnace for burning refuse, the combination of a shaft; aremovable sole closing the bottom of said shaft; a carriage; a slagcutting device on said carriage and adapted to be moved toward saidshaft; a rack on said carriage: an arm removably connecting said soleand rack; and means carried on said carriage and operatively engagingsaid rack.

3. In a furnace for burning refuse, the combination of a shaft; aremovable sole closing the bottom of said shaft; a. carriage; a slagcutting device on said carriage and adapted to be moved toward saidshaft; a rack on said carriage; an arm removably connecting said soleand rack; a pinion on said carriage engaging said rack; and means arriedby the carriage for operating the pinion.

4. In a furnace for burning refuse, the combination of a shaft; aremovable sole closing the bottom end of said shaft; a. frame carryingsaid sole; wheels carrying said frame; and means carried with saidwheels and adapted to move the center of said Wheels and thus to raiseand lower said sole.

5. In a. furnace for burning refuse, the combination of a shaft; aremovable sole closing the bottom end of said shaft; :1 frame carryingsaid sole; wheels carrying said frame; and eccentrics adapted to movethe center of said wheels and thus to raise and lower said sole.

6. In a furnace for burning refuse, the combination of a. shaft; a.removable sole closing the Bottmn end of said shaft; 9, name to thisspecification in the presence of frame carrying said sole; wheelscarrying two subscribing witnesses. said frame; and'eceentrics carriedby said IER Y wheels and adapted to move the center of V WALTER P NAsand wheels and thus to muse and lower smd wltnemesz sole GEORGELIuEQUIsT,

In testimony whereof, I have signed my EMIL SCHMIDT.

